| 摘要 |
<p>The drilling machine, with or without a changeable cruel, is mounted on a parallelogram (1). The opposite side of the parallelogram is mounted on a stand (2) or similar. The drilling machine is mounted on the parallelogram via an intermediate element (3). The intermediate element may itself serve as a stand. The parallelogram has several borings, by which the spacing between the drilling machine and the stand can be altered.</p> |
